feat: expand workspace to include libertas_infra and libertas_worker

feat(libertas_api): add dependency on libertas_infra and async-nats

refactor(libertas_api): consolidate config loading and add broker_url

refactor(libertas_api): integrate NATS client into app state and services

feat(libertas_core): introduce config module for database and server settings

fix(libertas_core): enhance error handling with detailed messages

feat(libertas_infra): create infrastructure layer with database repositories

feat(libertas_infra): implement Postgres repositories for media and albums

feat(libertas_worker): add worker service to process media jobs via NATS

libertas_core/src/error.rs

@@ -23,8 +23,8 @@ pub enum CoreError {
     #[error("Authentication failed: {0}")]
     Auth(String),
 
-    #[error("An unknown error occurred")]
-    Unknown,
+    #[error("An unknown error occurred: {0}")]
+    Unknown(String),
 }
 
 pub type CoreResult<T> = Result<T, CoreError>;